Medium
authentik: SAML source does not validate Conditions, timing, or audience on assertions
Type: advisorySources: OSV
authentik is an open-source identity provider. Prior to versions 2025.12.5 and 2026.2.3, the SAML source response processor (ResponseProcessor.parse()) does not validate the Conditions element on assertions. NotBefore, NotOnOrAfter, and AudienceRestriction are all ignored. This allows replay of expired assertions and acceptance of assertions intended for other service providers. This issue has been patched in versions 2025.12.5 and 2026.2.3.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-41577
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 16:39 UTC · Revision 1
Source evidence
authentik: SAML source does not validate Conditions, timing, or audience on assertions
core-osv · Original sourcePublished 2 Jun 2026, 17:12 UTC
authentik is an open-source identity provider. Prior to versions 2025.12.5 and 2026.2.3, the SAML source response processor (ResponseProcessor.parse()) does not validate the Conditions element on assertions. NotBefore, NotOnOrAfter, and AudienceRestriction are all ignored. This allows replay of expired assertions and acceptance of assertions intended for other service providers. This issue has been patched in versions 2025.12.5 and 2026.2.3.
osv:CVE-2026-41577
Complete source record
{
"id": "e3f498f6cc7e43ea7b0ba58eb4314f4fca16c589e59e503f6b901e5fb9034265",
"url": "https://osv.dev/vulnerability/CVE-2026-41577",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "authentik: SAML source does not validate Conditions, timing, or audience on assertions",
"summary": "authentik is an open-source identity provider. Prior to versions 2025.12.5 and 2026.2.3, the SAML source response processor (ResponseProcessor.parse()) does not validate the Conditions element on assertions. NotBefore, NotOnOrAfter, and AudienceRestriction are all ignored. This allows replay of expired assertions and acceptance of assertions intended for other service providers. This issue has been patched in versions 2025.12.5 and 2026.2.3.",
"evidence": "osv:CVE-2026-41577",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-41577",
"aliases": [
"BIT-authentik-2026-41577",
"CVE-2026-41577",
"GHSA-4v4x-x5pr-8gp2"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/goauthentik/authentik",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "c89d7c12d0d0cc213c43758475fe5f44e893b0cd"
},
{
"introduced": "8af491630b70ff6bd089753e21bef511bfb3f557"
},
{
"fixed": "095e2897d52397962d153be2d689cedcdb71906c"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:goauthentik:authentik:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "2025.12.5"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:goauthentik:authentik:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2026.2.0"
},
{
"fixed": "2026.2.3"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-41577.json"
}
}
],
"modified": "2026-10-28T02:30:30.474517424Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41577.json",
"https://github.com/goauthentik/authentik/security/advisories/GHSA-4v4x-x5pr-8gp2",
"https://nvd.nist.gov/vuln/detail/CVE-2026-41577"
],
"provider_metadata": {
"cwe_ids": [
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],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41577.json"
}
},
"related_cves": [
{
"value": "CVE-2026-41577",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 497501,
"published_at": "2026-06-02T17:12:26.69+00:00"
}